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RSpec.describe Magick::Image, '#composite_channel' do
it 'works' do
image1 = described_class.read(IMAGES_DIR + '/Button_0.gif').first
image2 = described_class.read(IMAGES_DIR + '/Button_1.gif').first
image1.define('compose:args', '1x1')
image2.define('compose:args', '1x1')
Magick::CompositeOperator.values do |op|
Magick::GravityType.values do |gravity|
result = image1.composite_channel(image2, gravity, 5, 5, op, Magick::BlueChannel)
expect(result).not_to be(image1)
end
end
expect { image1.composite_channel(image2, Magick::NorthWestGravity) }.to raise_error(ArgumentError)
expect { image1.composite_channel(image2, Magick::NorthWestGravity, 5, 5, Magick::OverCompositeOp, 'x') }.to raise_error(TypeError)
end
end
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